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About: SP-100     Goto   Sponge   NotDistinct   Permalink

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SP-100 (Space reactor Prototype) was a U.S. research program for nuclear fission reactors usable as small fission power systems for spacecraft. It was started in 1983 by NASA, the US Department of Energy and other agencies. A reactor was developed with heat pipes transporting the heat to thermoelectric generators. It was cooled with lithium.The project never advanced to flight hardware and was terminated in 1994.